尝试打开连接时超时。在尝试打开连接之前超时时间已过。出现这种情况可能是因为同时进行了太多非池化连接尝试。

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Timeout attempting to open the connection. The time period elapsed prior to attempting to open the connection has been exceeded. This may have occurred because of too many simultaneous non-pooled connection attempts.

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